In the U.S., "All-American" can mean two things.
(1) It can be used as a general phrase, meaning simply clean-cut and middle class. "He's the all-American boy" is a cliché sentence.
Note, this usage has nothing at all to do with sports.
Note, it is sometimes (often?) used (today) somewhat derogatorily or at any rate sarcastically. (I have no idea if that was the case in earlier usage; maybe it was originally used straight-up.)
(2) In the world of U.S. college sports, it specifically means: "in that year, the Nation's best athlete, for that particular team position."
(To clarify: consider college football. You have the various positions (quarterback, kicker, etc). Imagine a hypothetical "dream team" of the single best quarterback, best kicker, and so on nationwide. A number of major media outlets each year decide on such a "dream team": those top college athletes are that year's "All-Americans in college football" (or, whatever sport).)
(Just to further clarity: in professional sports similar terms have arisen, for example "All-Stars", "All-Pro" etc.)
Regarding the the first use of "All-American" in the college sports sense: "Wikipedia" asserts with absolutely no evidence given that it was an 1889 article: it is associated with Walter Camp (a "father of Football" historical figure in the U.S.).
In contrast to All-American-1, All-American-2 is not used sarcastically, it's just used neutrally to mean "the best quarterback (kicker, forward, whatever) that season".
What I seek to understand
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When did All-American-1 come in to use
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When did All-American-2 come in to use
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Was one or the other coined in one go from whole cloth by someone?
and mostly,
- In fact: is one or the other, a reference to the other? ie, one was already existing and the other was a reference to it?
Best Answer
Jack Armstrong, the All-American Boy was a radio series between 1933 and 1951. Every use of the term I remember as a child would have referred to that radio show, even though it ended before I started listening to radio.
My understanding was that the show was incredibly popular, and it would frequently get mentions & audio excerpts in, eg, Abbott and Costello movies that were filmed in that era (and which ran and reran on TV pretty much 24 hours a day up until maybe 1965).
The earliest reference that Ngram finds is 1938.
But apparently the term "All-American" with regard to sport goes back further. The Michigan Alumnus from 1922 contains:
And later:
So apparently "All-American", in the sense of an outstanding sports figure, goes back to at least 1917.
And an issue of The Michigan Alumnus from 1902 appears to reference the same concept.
So I would link "All-American Boy" to the "Jack Armstrong" radio show, but the term "All-American" to earlier sports use.
From there I'll leave it to the sports fanatics to pin down the origin of "All-American".
Update
Well, since no one else is doing it, here is the apparent origin of "All-American" in the sports sense:
Note that the team is called the "All-America" team, presumably due to selecting the best players from across the country (*), but the members of the team were/are referred to as "All-Americans".
(*) Apparently even in 1899 there was dissension in the ranks as to whether the best players were being chosen, vs favoring those of the East Coast.